Commit Graph

59 Commits

Author SHA1 Message Date
Ralf Baechle
87353d8ac3 [MIPS] SMP: Call platform methods via ops structure.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-01-29 10:14:57 +00:00
Ralf Baechle
217dd11e9d [MIPS] Sibyte: Split and move clock code.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-02 16:13:47 +00:00
Ralf Baechle
f3f9ad0edc [MIPS] Sibyte: Fixes for oneshot timer mode.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-02 16:13:47 +00:00
Thiemo Seufer
211a29a87c [MIPS] Swarm: Fix build failure
Signed-off-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-02 16:13:47 +00:00
Ralf Baechle
46abf4b39a [MIPS] SB1250: Use the right irqaction for the timer interrupt.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-02 16:13:46 +00:00
Ralf Baechle
d1598b6adb [MIPS] SB1250: Remove stray assignment of cpumask.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-02 16:13:46 +00:00
Ralf Baechle
2e5dcd2b4c [MIPS] Sibyte: Fix names of the clockevent devices.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-02 16:13:46 +00:00
Ralf Baechle
9e32a510af [MIPS] Sibyte: Build fixes / dead code removal.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-11-02 16:13:46 +00:00
Ralf Baechle
1238d5d868 [MIPS] time: Fix cut'n'paste bug in Sibyte clockevent driver.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-29 19:35:36 +00:00
Ralf Baechle
11ca25aa31 [MIPS] Sibyte: Delete {sb1250,bcm1480}_steal_irq().
They break the timer interrupt initialization and only seem to be a kludge
for initialization happening in the wrong order.  Further testing done by
Thiemo confirms the suspicion that the other invocations also seem to have
useless.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-29 19:35:35 +00:00
Ralf Baechle
d04533650f [MIPS] time: SMP-proofing of Sibyte clockevent/clocksource code.
The BCM148 has 4 cores but there are also just 4 generic timers available
so use the ZBbus cycle counter instead of it.  In addition the ZBbus
counter also offers a much higher resolution and 64-bit counting so I'm
considering a later complete conversion to it once I figure out if all
members of the Sibyte SOC family support it - the docs seem to agree but
the headers files seem to disagree ...

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-22 22:09:00 +01:00
Ralf Baechle
d527eef5b7 [MIPS] Sibyte: Finish conversion to modern time APIs.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-19 18:15:58 +01:00
Atsushi Nemoto
9ee5389c58 [MIPS] Sibyte: Fix typos in sibyte clockevent drivers
Fix some typo introduced on clockevent conversion.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-17 18:28:49 +01:00
Ralf Baechle
21a151d8ca [MIPS] checkfiles: Fix "need space after that ','" errors.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-11 23:46:15 +01:00
Ralf Baechle
9b9ea2202f [MIPS] Clockevent driver for BCM1250
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-11 23:46:10 +01:00
Ralf Baechle
7bcf7717b6 [MIPS] Implement clockevents for R4000-style cp0 count/compare interrupt
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-11 23:46:09 +01:00
Ralf Baechle
91a2fcc886 [MIPS] Consolidate all variants of MIPS cp0 timer interrupt handlers.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-11 23:46:09 +01:00
Ralf Baechle
05dc8c02bf [MIPS] ARC: Get rid of mips_machgroup
This has not been any serious user of this ill conceived thing since the
original invention in like '95.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-11 23:46:08 +01:00
Ralf Baechle
7c4b4773b9 [MIPS] Sibyte: cleanup static inline forward declarations.
In fact there are no foward declarations at all needed when moving things
into the right order.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-11 23:46:05 +01:00
Ralf Baechle
477f949e0a [MIPS] Sibyte: CONFIG_SIBYTE_SB1250_DUART -> CONFIG_SERIAL_SB1250_DUART
This is needed since the Sibyte serial driver was exchanged.

Issue report by Imre Kaloz <kaloz@openwrt.org>.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-08-27 02:16:51 +01:00
Ralf Baechle
dde96ca8b3 [MIPS] Use -Werror on subdirectories which build cleanly.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-31 21:35:33 +01:00
Maciej W. Rozycki
b45d527974 sb1250-duart.c: SB1250 DUART serial support
This is a driver for the SB1250 DUART, a dual serial port implementation
included in the Broadcom family of SOCs descending from the SiByte SB1250
MIPS64 chip multiprocessor.  It is a new implementation replacing the
old-fashioned driver currently present in the linux-mips.org tree.  It
supports all the usual features one would expect from a(n asynchronous)
serial driver, including modem line control (as far as hardware supports it
-- there is edge detection logic missing from the DCD and RI lines and the
driver does not implement polling of these lines at the moment), the serial
console, BREAK transmission and reception, including the magic SysRq.  The
receive FIFO threshold is not maintained though.

The driver was tested with a SWARM board which uses a BCM1250 SOC (which is
dual MIPS64 CMP) and has both ports of the single DUART implemented wired
externally.  Both were tested.  Testing included using the ports as
terminal lines at 1200bps (which is the ports minimum), 115200bps and a
couple of random speeds inbetween.  The modem lines were verified to
operate correctly.  No testing was performed with a use as a network
interface, like with SLIP or PPP.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:03 -07:00
Mark Mason
d619f38fda [MIPS] Add bcm1480 ZBus trace support, fix wait related bugs
Make ZBus tracing generic - moving it to a common direcotry under
arch/mips/sibyte, add bcm1480 support and fix some wait related
bugs (thanks to Ralf for assistance on that).

Signed-off-by: Mark Mason <mason@broadcom.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-04-27 16:20:25 +01:00
Mark Mason
9a9943575a [MIPS] Add missing silicon revisions for BCM112x
Recent versions of the BCM112X processors aren't recognized by Linux
(preventing Linux from booting on those processors).  This patch adds
support for those that are missing.

Signed-off-by: Mark Mason <mason@broadcom.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-04-20 14:58:37 +01:00
Thiemo Seufer
119537c092 [MIPS] Misc fixes for plat_irq_dispatch functions
o adds missing ST0_IM masks, which caused the logging of valid interrupts
   as spurious
 o stops pnx8550 to log every interrupt as spurious
 o adds cause register masks for ip22/ip32, which caused handling of masked
   interrupts
 o removes some superfluous parentheses in the SNI interrupt code

Signed-Off-By: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-19 20:22:43 +00:00
Ralf Baechle
bb9b813bb6 [MIPS] Sibyte: Fix ZBbus profiler
o Fix build error.
 o Handle error returns.
 o Deal with signals received while sleeping.
 o Don't allow to be selected when we're not building the directory with
   the driver anyway.
 o Coding style cleanups.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-09 20:27:31 +00:00
Ralf Baechle
36a885306f [MIPS] Fix and cleanup the mess that a dozen prom_printf variants are.
early_printk is a so much saner thing.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-03-04 19:02:37 +00:00
Atsushi Nemoto
d2af363cfb [MIPS] Kill redundant EXTRA_AFLAGS
Many Makefiles in arch/mips have EXTRA_AFLAGS := $(CFLAGS) line.  This
is redundant while AFLAGS contains $(cflags-y) and any options only
listed in CFLAGS (not in cflags-y) should be unnecessary for asm
sources.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-26 23:06:05 +00:00
Arjan van de Ven
5dfe4c964a [PATCH] mark struct file_operations const 2
Many struct file_operations in the kernel can be "const".  Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data.  In addition it'll catch accidental writes at compile time to
these shared resources.

[akpm@osdl.org: sparc64 fix]
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-12 09:48:44 -08:00
Atsushi Nemoto
70d21cdeef [MIPS] use name instead of typename for each irq_chip
The "typename" field was obsoleted by the "name" field.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-06 16:53:14 +00:00
Atsushi Nemoto
c44e8d5e47 [MIPS] prom_free_prom_memory cleanup
Current prom_free_prom_memory() implementations are almost same as
free_init_pages(), or no-op.  Make free_init_pages() extern (again)
and make prom_free_prom_memory() use it.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-02-06 16:53:09 +00:00
Atsushi Nemoto
005985609f [MIPS] mips HPT cleanup: make clocksource_mips public
Make clocksource_mips public and get rid of mips_hpt_read,
mips_hpt_mask.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-11-30 01:14:49 +00:00
Atsushi Nemoto
1603b5aca4 [MIPS] IRQ cleanups
This is a big irq cleanup patch.

* Use set_irq_chip() to register irq_chip.
* Initialize .mask, .unmask, .mask_ack field.  Functions for these
  method are already exist in most case.
* Do not initialize .startup, .shutdown, .enable, .disable fields if
  default routines provided by irq_chip_set_defaults() were suitable.
* Remove redundant irq_desc initializations.
* Remove unnecessary local_irq_save/local_irq_restore, spin_lock.

With this cleanup, it would be easy to switch to slightly lightwait
irq flow handlers (handle_level_irq(), etc.) instead of __do_IRQ().

Though whole this patch is quite large, changes in each irq_chip are
not quite simple.  Please review and test on your platform.  Thanks.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-11-30 01:14:46 +00:00
Atsushi Nemoto
16b7b2ac01 [MIPS] Fixup migration to GENERIC_TIME
Since we already moved to GENERIC_TIME, we should implement alternatives
of old do_gettimeoffset routines to get sub-jiffies resolution from
gettimeofday().  This patch includes:

 * MIPS clocksource support (based on works by Manish Lachwani).
 * remove unused gettimeoffset routines and related codes.
 * remove unised 64bit do_div64_32().
 * simplify mips_hpt_init. (no argument needed, __init tag)
 * simplify c0_hpt_timer_init. (no need to write to c0_count)
 * remove some hpt_init routines.
 * mips_hpt_mask variable to specify bitmask of hpt value.
 * convert jmr3927_do_gettimeoffset to jmr3927_hpt_read.
 * convert ip27_do_gettimeoffset to ip27_hpt_read.
 * convert bcm1480_do_gettimeoffset to bcm1480_hpt_read.
 * simplify sb1250 hpt functions. (no need to subtract and shift)
    
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-10-31 20:13:23 +00:00
Ralf Baechle
36d98e79b7 [MIPS] A few more pt_regs fixups.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-10-19 17:55:13 +01:00
Ralf Baechle
27f768192f [MIPS] Cleanup unnecessary <asm/ptrace.h> inclusions.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-10-09 00:15:28 +01:00
Ralf Baechle
937a801576 [MIPS] Complete fixes after removal of pt_regs argument to int handlers.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-10-08 02:38:28 +01:00
Maciej W. Rozycki
d599def5cd [MIPS] SB1250: Interrupt handler fixes
Mask cp0.status against cp0.cause.  Additionally, spurious interrupts are
not recorded.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-10-03 17:59:17 +01:00
Ralf Baechle
dc41fb4396 [MIPS] Fix 32-bit kernel by replacing 64-bit-only code.
dclz() expects its 64-bit argument being passed as a single register
but on 32-bit kernels it'll actually be in a register pair.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-09-27 13:37:35 +01:00
Thiemo Seufer
6e61e85b09 [MIPS] Sibyte: Improve interrupt latency again for sb1250/bcm1480
this patch restores the behaviour of the old (assembly-written)
interrupt handler, the handler is left as soon as a single interrupt
cause is handled.

Signed-off-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-07-13 21:26:05 +01:00
Ralf Baechle
94dee171df [MIPS] Eleminate interrupt migration helper use.
> #define hw_interrupt_type       irq_chip
> typedef struct irq_chip         hw_irq_controller;
> #define no_irq_type             no_irq_chip
> typedef struct irq_desc         irq_desc_t;

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-07-13 21:25:58 +01:00
Jörn Engel
6ab3d5624e Remove obsolete #include <linux/config.h>
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-30 19:25:36 +02:00
Ingo Molnar
d1bef4ed5f [PATCH] genirq: rename desc->handler to desc->chip
This patch-queue improves the generic IRQ layer to be truly generic, by adding
various abstractions and features to it, without impacting existing
functionality.

While the queue can be best described as "fix and improve everything in the
generic IRQ layer that we could think of", and thus it consists of many
smaller features and lots of cleanups, the one feature that stands out most is
the new 'irq chip' abstraction.

The irq-chip abstraction is about describing and coding and IRQ controller
driver by mapping its raw hardware capabilities [and quirks, if needed] in a
straightforward way, without having to think about "IRQ flow"
(level/edge/etc.) type of details.

This stands in contrast with the current 'irq-type' model of genirq
architectures, which 'mixes' raw hardware capabilities with 'flow' details.
The patchset supports both types of irq controller designs at once, and
converts i386 and x86_64 to the new irq-chip design.

As a bonus side-effect of the irq-chip approach, chained interrupt controllers
(master/slave PIC constructs, etc.) are now supported by design as well.

The end result of this patchset intends to be simpler architecture-level code
and more consolidation between architectures.

We reused many bits of code and many concepts from Russell King's ARM IRQ
layer, the merging of which was one of the motivations for this patchset.

This patch:

rename desc->handler to desc->chip.

Originally i did not want to do this, because it's a big patch.  But having
both "desc->handler", "desc->handle_irq" and "action->handler" caused a
large degree of confusion and made the code appear alot less clean than it
truly is.

I have also attempted a dual approach as well by introducing a
desc->chip alias - but that just wasnt robust enough and broke
frequently.

So lets get over with this quickly.  The conversion was done automatically
via scripts and converts all the code in the kernel.

This renaming patch is the first one amongst the patches, so that the
remaining patches can stay flexible and can be merged and split up
without having some big monolithic patch act as a merge barrier.

[akpm@osdl.org: build fix]
[akpm@osdl.org: another build fix]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-29 10:26:21 -07:00
Thiemo Seufer
4fb60a4b80 [MIPS] Random fixes for sb1250
Random improvements for sb1250: Silence compiler warnings, a bugfix for
the profiling code, and a comment typo.

Signed-off-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-06-19 17:39:24 +01:00
Ralf Baechle
e4ac58afdf [MIPS] Rewrite all the assembler interrupt handlers to C.
Saves like 1,600 lines of code, is way easier to debug, compilers
frequently do a better job than the cut and paste type of handlers many
boards had.  And finally having all the stuff done in a single place
also means alot of bug potencial for the MT ASE is gone.

The only surviving handler in assembler is the DECstation one; I hope
Maciej will rewrite it.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-04-19 04:14:21 +02:00
Ralf Baechle
a904f74785 [MIPS] Sibyte: Fix race in sb1250_gettimeoffset().
From Dave Johnson <djohnson+linuxmips@sw.starentnetworks.com>:
    
sb1250_gettimeoffset() simply reads the current cpu 0 timer remaining
value, however once this counter reaches 0 and the interrupt is raised,
it immediately resets and begins to count down again.
    
If sb1250_gettimeoffset() is called on cpu 1 via do_gettimeofday() after
the timer has reset but prior to cpu 0 processing the interrupt and
taking write_seqlock() in timer_interrupt() it will return a full value
(or close to it) causing time to jump backwards 1ms. Once cpu 0 handles
the interrupt and timer_interrupt() gets far enough along it will jump
forward 1ms.
    
Fix this problem by implementing mips_hpt_*() on sb1250 using a spare
timer unrelated to the existing periodic interrupt timers. It runs at
1Mhz with a full 23bit counter.  This eliminated the custom
do_gettimeoffset() for sb1250 and allowed use of the generic
fixed_rate_gettimeoffset() using mips_hpt_*() and timerhi/timerlo.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-03-18 16:59:30 +00:00
Ralf Baechle
4308cb1628 [MIPS] Sibyte: Fix interrupt timer off by one bug.
From Dave Johnson <djohnson+linuxmips@sw.starentnetworks.com>:
    
The timers need to be loaded with 1 less than the desired interval not
the interval itself.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-03-18 16:59:30 +00:00
Ralf Baechle
b6f7880b6c [MIPS] Reformat to 80 columns.
Patch courtesy of Emily Postnews ;-)
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-02-07 13:30:23 +00:00
Ralf Baechle
5ac71fd1cf [MIPS] Sibyte: Make all setup functions __init.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-02-07 13:30:23 +00:00
Ralf Baechle
fcdb27ad1d [MIPS] Rename _machine_power_off to pm_power_off so the kernel builds again.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-02-07 13:30:22 +00:00